title: Lipomatous meningioma with concomitant acute subdural hematoma--case report--.
abstract: A 55-year-old man presented with a rare lipomatous meningioma associated with acute subdural hematoma manifesting as sudden onset of severe headache, but no neurological deficit. No evidence of trauma or underlying predisposition to hemorrhage was seen. Fluid-attenuated inversion-recovery magnetic resonance imaging showed a thin hyperintense area in the right temporal convexity, and an extra-axial mass appearing as mixed hypointensity and hyperintensity. Two weeks later, right temporal craniotomy was performed and the tumor was totally resected with the attached dura. The hematoma was localized at the inferior margin of the mass and connected directly with the tumor. Histological examination of the resected specimen revealed typical meningothelial meningioma admixed with mature adipose tissue. Longstanding intratumoral congestion probably caused hyaline deposition in the tissue, leading to vessel rupture.
authors.affiliation: Department of Neurosurgery, Iwate Medical University School of Medicine, Morioka, Iwate, Japan. hkashi@iwate-med.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kashimura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Arai
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Ogasawara
authors.forename: Takaaki
authors.initials: T
authors.lastname: Beppu
authors.forename: Akira
authors.initials: A
authors.lastname: Kurose
authors.forename: Akira
authors.initials: A
authors.lastname: Ogawa
mesh_terms: D004388:Dura Mater / Q000473:pathology / Q000601:surgery; D020199:Hematoma, Subdural, Acute / Q000209:etiology* / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008576:Meningeal Arteries / Q000473:pathology / Q000503:physiopathology; D008577:Meningeal Neoplasms / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D019635:Neurosurgical Procedures; D016896:Treatment Outcome